de la Hoz Pablo, Sakovich Anton, Mikhalychev Alexander, Thornton Matthew, Korolkova Natalia, Mogilevtsev Dmitri
School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews KY16 9SS, UK.
B. I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, Nezavisimosti Ave. 68-2, 220072 Minsk, Belarus.
Nanomaterials (Basel). 2020 Sep 30;10(10):1952. doi: 10.3390/nano10101952.
We present a theoretical proposal for an integrated four-wave mixing source of narrow-band path-entangled photon pairs with efficient spatial pump self-rejection. The scheme is based on correlated loss in a system of waveguides in Kerr nonlinear media. We calculate that this setup gives the possibility for upwards of 100 dB pump rejection, without additional filtering. The effect is reached by driving the symmetric collective mode that is strongly attenuated by an engineered dissipation, while photon pairs are born in the antisymmetric mode. A similar set-up can additionally be realized for the generation of two-photon NOON states, also with pump self-rejection. We discuss the implementation of the scheme by means of the coherent diffusive photonics, and demostrate its feasibility in both glass (such as fused silica-glass and IG2) and planar semiconductor waveguide structures in indium phosphide (InP) and in silicon.
我们提出了一种理论方案，用于构建一个集成的四波混频源，以产生具有高效空间泵浦自抑制的窄带路径纠缠光子对。该方案基于克尔非线性介质中波导系统的相关损耗。我们计算得出，这种设置在不进行额外滤波的情况下，有实现超过100 dB泵浦抑制的可能性。通过驱动由工程耗散强烈衰减的对称集体模式来实现这一效果，而光子对则产生于反对称模式。类似的设置还可以用于产生双光子NOON态，同样具有泵浦自抑制功能。我们讨论了通过相干扩散光子学实现该方案的方法，并证明了其在玻璃（如熔石英玻璃和IG2）以及磷化铟（InP）和硅中的平面半导体波导结构中的可行性。
